/usr/share/doc/libpgplot-perl/README.Debian

pgperl for DEBIAN
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This package consists of a perl module called PGPLOT. pgplot
is a subroutine library, and PGPLOT is the corresponding perl module.
Try "perldoc PGPLOT" to start learning about it. ( "man perldoc" for more on
perldoc). Or try "man PGPLOT" . Also type "man pgplot" to get documentation
on the FORTRAN and C interfaces to the library, much of which applies
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